More "Normal"

I'm back to my "normal". Very tired in the morning, caffeine's effect is limited, naps always sound good and adrenaline is the best thing to keep me awake. I have wondered whether the latter isn't a big part of the problem. Perhaps I became too used to infusions of adrenaline as a kid? Could it be that I don't function well today because my system grew used to having a higher than "normal" level? Perhaps without stress I just don't function, and with too much stress I lose it completely? I wonder if that's plausible.